Soft-coal cook stove and range



(No Modell.)

I. B. SAWYER 8u T. CLARK.

SOPTGOAL 000K STOVB AND RANGE.

Eo. 308,864. Pate d Dec. 2, 1884.

NrTnn STATES PATENT OFFICE..

IRVIN B. SANVYER AND THOMAS CLARK, OF QUINCY, ILLINOIS.

SOFT-COAL COOK`STOVE AND RANGE.

SPECIFICATION forming part of Letters Patent N0. 308,864, dated December2, 1884.

To all whom t may concern; y

Beit known that we, IRVIN B. SAWYER and THOMAS CLARK, citizens of theUnited States, residing at Quincy, in the county of Adams and State ofIllinois, have invented a new and useful Improvement in SoftCoal CookStoves and Bauges, of which the following is a specification.

Our invention relates to improvements in soft-coal cook stoves andranges; and the objects of our improvements are, first, to heat thefront, bottom, and back plates of the oven with hot air in conjunctionwith the direct heat from the lire passing over the top of the oven;second, to afford facilities for the distribution of the direct heatfrom the iire equally over the top of the oven and under the top plateof the stove or range. Ve attain these objects by the arrangementsillustrated in the accompanying drawings, in which* Figure l ris alongitudinal section of the stove, taken vertically on the line y y ofFig. 2. Fig.- 2 is a plan view of the stove with the top plate of thestove removed. Fig. 3 is a plan. Fig. 4 is a side view of the stove.Fig. 5 is a section on line 1 1 of Fig. 1. Fig. 6 is a section on linea: x of Fig. 1.

Similar letters refer to similar parts th rough out the several views.

On the top plate, B, is placed the elevated ue A, as shown.

C C are vertical` partitions between the top plate, B, and the top plateof the oven O, forming three dues, S S S, over the oven O for thepassage of the direct fire-heat, as indicated by the arrows b b. Thecenter flue S discharges through the hole Kin the top plate, B, into theflue-box A, thence by the pipe-exit P to chimney.

D D D are dampers secured toa rod pass ing through the plates G C, asshown, for the purpose of regulating the direct draft. The

center damper is fixed at right angles to the two side dampers.

4E E are two vertical curved plates at the rear end ofthe two outsidefines, S S. These plates are joined to the two side plates, N N, and areseparated opposite the 'cent-er flue S, leaving a passage for the hotair from the chamber H .the plate M, Figs. 1 and 5, to the chamber H3,

Fig. l, at the bottom of the oven O; thence through the chamber H", atthe rear of the ov'en O, it passes between the plates E E, and4 forms ajunction with the direct heat from the fire, producing a more perfectcombustion.

I, Figs. 1 and 2, lis an outer air-chamber for the more perfectprotection from outside temperature of the hot-air chamber H around theoven O.

L is an interposed shellbetween the hot-air chamber H3 and the chamberI, and J is the ash-box. i

N are the side and bottom plates of the stove or range, and P is theexit-pipe for smoke.`

The arrows indicated by the letter a show the direction of the hot-airaround the firebox F and oven O, and those indicated by the letter bshow the passage of the direct fire heat.

Heretofore cooking-stoves adapted to burn soft coal have generally beenso constructed that the product-s of combustion were carried around theoven through various flues to heat the same, thereby causing anaccumulation of soot in the fines, which in time prevent the passage ofthe heat b blocking the flues. This soot was'liable to e red by thesparks and llame from the fire-box.

It has been suggested to form a chamber about the fire-box with openingsto the outer air for the admission of fresh air, and provided withchannels leading under the oven and be hind the same, connected withthischamber, to heat the oven by hot air, the products of combustionpassing over the top plate of the Oven tothe rear where the exit-pipewas located, and where it met with the current of heated air rising fromthe flue at the rear of the oven. This arrangement was quite as objectionable as the old form, as the heavy pro- IOC) ducts of combustionwould, after being deiiectcd against the rear Wall of the stove, fall tothe bottom of the rear iiue, and in a very short time accumulate sootand ashes to such an extent in the bottom of the flue as to stop theproper circulation of the hot air.

Our invention is designed to overcome these objections and diflicultiesby carrying the products of combustion to the exit-pipe Without comingin contact with the rear Wall of the stove, and Without crossing any ofthe hotair iiues, and by heating the front, bottoni, and back of theoven by heated air from a heating-chamber around the fire-box.

Our next improvement consists in the arrangement of the flues over thetop oveirplate, which are three in number. The direct heat from the iirepasses along each side to the center iiue, where a junction is formedwith the hot air from the rear plate of the oven, and is rcturnedthrough the center flue to find its exit through the lue-box on top ofthe stove or range. By this arrangement We get an equal division ofthedirect Vlire heat over the top ovenplate, and also an equal draft on thetire, the result of which is the coal is consumed equally as readily atthe sides as at the center ofthe fireboX, by which the durability of thefire-plates are enhanced as well as the heat more equally distributed.By the Hue-box on top of the stove or range We not only getan equaldivision of the lines below, but obtain a direct up- Ward draft to thedischarge-pipe, thence to chimney. Ve also by this device retain the middle back pot hole or opening in an elevated position, rendering it muchmore convenient for use than when placed on a level With the otheropenings. The hot-air chamber around the bottom and rear end of the ovenis protected from outside temperature by an outer air-chamber.

Having fully described our invention, what We desire to claim and secureby Letters Patent isl. In a stove, the combination of a hot-air chambersurrounding the fire-box, passages leading therefrom forming acontinuous flue for the hot air around the front, bottom, back, and topof the oven, an exitiiue arranged directly above the oven and Out ofdirect line with the h0t-air iiue at the back, anda flue or lues fromthe ireboX to said exit-pipe, whereby the products of combustion pass tothe exit pipe Without crossing the hot-air-ilue openings, substantiallyas described, and for the purpose set forth.

2. In a stove, the combination of a hot-air chamber surrounding thefire-box, passages leading therefrom forming a continuous iuefor the hotair around the front, bottom, back, and top of the oven, andan eXit-iuearranged directly above the oven and out of direct line with the hot-airflue at the back, with ilues for the products of combustion arrangedupon the top plate of the stove formed with the Walls C C and having thedampers, whereby a direct or indirect draft is obtained by the movementof one lever, substantially as described.

3. In a stove of substantially the form described, the combination, withthe exitilue arranged above the oven and out of direct line With thehot-air flue at the back, of the ilues for the products of combustion,the walls C C, dampers D D, and the deflecting-plates E E, allsubstantially as described, and for the purpose set forth.

RVIN B. SAVYER. THOMAS CLARK.

